A kind of L-shaped unequal wall thickness profile production method

Abstract

The invention discloses a method for producing L-shaped profiles with unequal wall thickness, which belongs to the technical field of metal processing. The main steps include: firstly, using an ingot as a raw material; Press into L-shaped profiles with unequal wall thickness, and obtain L-shaped finished extrusions by shearing; then, send L-shaped finished extrusions into the cooling device for cooling; finally, the cooled L-shaped finished extrusions It is sent to the rolling orthopedic process, and the final product is obtained after the orthopedic process, and the post-processing process is carried out. The method of the invention can not only eliminate defects such as waves, bending, and twisting deformation of L-shaped profiles with unequal wall thicknesses, but also improve the dimensional accuracy and performance of the profiles, as well as improve the production efficiency of extrusion and the service life of the mold, and shorten the The production cycle is shortened, and the long-length production process of "long-length extrusion, long-length cooling, and long-length orthopedic" for L-shaped unequal wall thickness profiles has been realized, which has significant economic benefits.

Description

technical field [0001] The invention belongs to the technical field of metal processing, and in particular relates to aluminum alloy extrusion production, in particular to a production method of L-shaped profiles with unequal wall thickness. Background technique [0002] At present, L-shaped aluminum alloy profiles are usually produced by die extrusion, which is acceptable for the production of L-shaped aluminum alloy profiles with equal wall thickness, but for L-shaped aluminum alloy profiles with unequal wall thickness, especially the extruded The cast ingot is made of hard aluminum alloy of 5A05 material. The L-shaped profile with unequal wall thickness produced by the existing extrusion die will cause twisting, In the case of bending and corner deformation, and the flow velocity inside and outside the thin-walled end of the profile is inconsistent, there will be out-of-tolerance deformation in the gap (such as figure 1 shown). However, for the twisting deformation that...

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Problems solved by technology

[0002] At present, L-shaped aluminum alloy profiles are usually produced by die extrusion, which is acceptable for the production of L-shaped aluminum alloy profiles with equal wall thickness, but for L-shaped aluminum alloy profiles with unequal wall thickness, especially the extruded The cast ingot is made of hard aluminum alloy of 5A05 material. The L-shaped profile with unequal wall thickness produced by the existing extrusion die will cause twisting, In the case of bending and corner deformation, and the flow velocity inside and outside the thin-walled end of the profile is inconsistent, there will be out-of-tolerance deformation in the gap (such as figure 1 shown)

However, for the twisting deformation that occurs, if it is stretched and corrected (the stretching deformation is controlled at 0%-0.5%, not too large), the twisting deformation will be basically eliminated. However, when it is tested on the platform, its The amount of deformation will become larger if the gap is out of tolerance

Therefore, the traditional production method restricts the production of L-shaped profiles with unequal wall thickness, which has the disadvantage of poor stability, which in turn affects the production rhythm of subsequent cooling, orthopedic and other finishing processes, and the production efficiency is low. For large-scale production of profiles, it is necessary to design a method that can eliminate defects such as profile waves, bending, and twisting deformation, so as to ensure that the profile dimensions are qualified and at the same time realize the long-length production process of profiles

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